138 "B'^'NNE : GEOLOGY OF KUTCH. [PART II. 



A strange assemblage of many colored volcanic-looking rocks occurs 

 to the west of Loonwa. These are distinctly 



West of Loonwa. 



faulted at one place, abutting against the traps. 

 On the south side of this fault the trap is succeeded by thick pseudo- 

 conglomeritic and concretionary laterite. On the north side the rooks 

 are varied, — purple, dark, and red lavas, volcanic dust and breccias ; 

 some are very ferruginous and cindery looking. 



This accumulation presents no arrangement, in consequence of 

 which and the occurrence of faults, its relation to the , other rocks is 

 obscure. — (F. F.) 



At the western end of this chain of hills is a heavily rounded 

 somewhat dome-shaped elevation called Lettera, 



Lettera hill. 



composed almost entirely of dark greyish and 

 black compact basalt. Lines of flow or bedding are difficult to find, 

 but the whole mass has a southerly inclination.. 



In this direction it is overlaid by the lateritie or sub-nummulitic 

 group, which also appears at its western end. At a little distance further 

 to the westward, masses of pseudo-brecciated red and black haematite, 

 full 50 feet in height, are associated with decomposing sub-columnar 

 and concretionary trap at nearly the same elevation, these being probably 

 brought together by a fault. 



Approaching the western end of the hills from Doodaee, the jui-assie 

 rocks are seen to be succeeded by undulating beds of ferruginous or 

 lateritie breccia, with a low south-westerly dip of 5°. These beds occm- 

 on slightly rising ground, are scoriaeeous and volcanic-looking, enclosing 

 blocks of deep red and purple hssmatite ; upon them rests a thick bed 

 of concretionary many coloured ashy rocks, some of the concretions 

 being 3 feet 6 inches wide, with ferruginous concentric markings, and 

 divided from each other by coatings of haematite. The hsematitic masses 



( 138 ) 



